October 2010 Math SAT Thread

<p>I had the experimental CR section… Just don’t know which it was! All i know is i did more reading to day than I would have liked.</p>

<p>i thought the one with the x^2+y^2 and xy= -10 (or something like that) was extremely easy actually. it was the last question on one of the sections so when i briefly looked at it i told myself i wasn’t going to even try to do it because the last questions are usually the hardest. i almost started laughing when i saw what the problem was really like…lol</p>

<p>and for the m(x+2) = 12, i got m=2. but the number you plugged in for x was 4. and i can’t remember what i put down. agggh, i think i saw a 4 when i was going over my answers. ugh.!</p>

<p>oh and the max - min? i originally thought that was really hard too >.< cuz it was the question before the last question.</p>

<p>and the 5 rectangles one? they asked for the area. were they trying to trick us? pretty sure it still stays as 10…</p>

<p>Which problems were #18 and #20 in the twenty question section ??</p>

<p>i thought the CR was pretty hard.</p>

<p>I thought it was a pretty hard test. Also, I had a a math experimental, but I don’t remember having anything about a cone… Did anyone get a different math experimental/do they give out different ones for the same subject matter?</p>

<p>The math section with the question about birds chirping in the spring wasn’t experimental, was it?</p>

<p>There were 2 math experimentals, one was a grid in the other was 20 questions</p>

<p>The one with the 2/3 as A/B with A, a positive integer, being less than 10, the answer is NOT 3. It’s 4. </p>

<p>A can be 2 when B is 3, A can be 4 when b is 6, and A can be 8 when b is 12</p>

<p>^ so you just mentioned three answers…</p>

<p>Hey guys do you remember there is a question about consecutive even integers and the answer is -2?..Is that one in the experimental section?I think i only missed that one because i thought 0 was neither even nor odd ■■■</p>

<p>i double checked that question, actually, when i was solving it.
both a AND b must be less than 10.</p>

<p>I agree with snoopi the answer for the a/b question is 3 NOT 4</p>

<p>Agree, a and b were both integers less than 10, so the possibilities were 2/3, 4/6, and 6/9.</p>

<p>@Papapia: You just contradicted yourself. In your last combination, B is greater than 10.
The possibilities are: 1/3, 2/6, 6/9. That is, three total possibilities.</p>

<p>1/108 is wrong.
if you are to say that it is 1/6 x 1/6 x 2/6, then you’re counting the order.
that is…
1 2 3
1 3 2
1 1 1 and so on are all included under 216 possibilities.
and you have 4 ways to get 17 or 18… (566 665 656 666)
if you are to say that 566 and 656 are the same, then your answer should be
2/(18-2) because what you’re then counting is the sum, not the combinations that make up the sum.
so the answer is 4/216.</p>

<p>hey so for the question with x^y=8 I know the answer for x+z=7 but does anyone remember what the letter was for 7? I remember it was one of the middle ones…</p>

<p>■■■. i hate timing tests…</p>

<p>@jumpshooter, i think 7 was letter C, but I’m not positive.</p>

<p>was one of the answers</p>

<p>x^2 > 5/3 * y*^2?</p>

<p>In regards to the dice problem, </p>

<p>I am almost 99% sure the question was asking “what is the probability of rolling a number that has a sum of 17 or 18 with three six-sided dice?”</p>

<p>Obviously, everyone is sure that 6^3 is 216 for the bottom. </p>

<p>We are asked what is the chance that we will roll three six-sided dice, and come up with either 17 or 18 as the sum of the three dice? There is one way to get 18, three sixes. There is ONLY one combination to get 17: two sixes and one five. There are only two ways to get either 17 or 18. Therefore I put 1/108 as my answer. As I explained it to my friends, it seemed pretty convincing and they agreed with me after. I am not looking to start a flame war. If anyone can find a logical fallacy in my method of solving this problem I will gladly read over it.</p>